| 多光谱辐射层析重建三维火焰温度场 |
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| 引用本文： | 万雄,高益庆,何兴道.多光谱辐射层析重建三维火焰温度场[J].光学学报,2003,23(9):099-1104. |
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| 作者姓名： | 万雄 高益庆 何兴道 |
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| 作者单位： | 1. 南京航空航天大学自动化学院,南京,210016;南昌航空工业学院测控系,南昌,330034
2. 南昌航空工业学院测控系,南昌,330034 |
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| 基金项目： | 中国航空科学基金 (0 0I5 6 0 0 0 4 )，江西省测控工程研究中心基金 (KG2 0 0 10 4 0 0 2 )资助课题 |
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| 摘 要： | 提出一种基于多光谱辐射测温理论及光学层析技术的三维温度场重建方法。建立了基于参考温度的多光谱测温法数学模型，提出了一种基于模拟退火理论的变松弛因子的光学层析技术新算法，通过计算机数值模拟，详细考察了该算法对非对称温度场分布的重建效果并与传统的代数迭代重建算法及滤波反投影算法进行比较。计算结果表明，变弛豫因子重建算法重建精度最高。作为一个应用实例，用多光谱辐射变弛豫因子重建层析方法重建了四峰蜡烛火焰某一截面的温度分布。
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| 关 键 词： | 多光谱辐射层析 图像重建算法 数值模拟 火焰温度场 辐射测温 光学层析技术 变弛豫因子 信噪比 |
| 收稿时间： | 2002/8/8 |
Three-Dimensional Flame Temperature Field Reconstruction with Multi-Wavelength Radiation Computed Tomography |
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| Wan Xiong , Gao Yiqing He Xindao Institute of Automation,Nanjing University of Aeronautics and Astronautics,Nanjing.Three-Dimensional Flame Temperature Field Reconstruction with Multi-Wavelength Radiation Computed Tomography[J].Acta Optica Sinica,2003,23(9):099-1104. |
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| Authors: | Wan Xiong Gao Yiqing He Xindao Institute of Automation Nanjing University of Aeronautics and Astronautics Nanjing |
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| Institution: | Wan Xiong 1,2 Gao Yiqing 2 He Xindao 2 1 Institute of Automation,Nanjing University of Aeronautics and Astronautics,Nanjing 210016 2 Department of Measuring and Control Engineering,Nanchang Institute of Aeronautical Technology,Nanchang 330034 |
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| Abstract: | A novel 3 D temperature field reconstruction method is proposed, which is based on multi wavelength thermometry and optical computed tomography. A mathematical model of multi wavelength thermometry is founded, and a novel optical computed tomography based on changeable relaxation parameter technique is proposed. Through computer simulation and comparison with algebraic reconstruction technique and filter back projection algorithm, the reconstruction results of the new method are discussed in detail. The study shows that the new method always gives the best reconstruction results. As an example, temperature distribution of a profile of four peaks candle flame is reconstructed with multi wavelength radiation computed tomography. |
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| Keywords: | multi wavelength radiation computed tomography image reconstruction algorithm numerical simulation and experiment flame temperature field simulated annealing algorithm |
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